Does anyone know of an accountant in Bali that can do my Australian tax return?
I don't and my gut feeling is that I wouldn't even contemplate it.
As
ronb suggested, take a good hard look at the Australian Tax Office's website and the services available.
You
might also get some clues from the Australian Consulate in Denpasar, although for obvious reasons, it's not their job to recommend individual doctors, lawyers, accountants, etc. They probably have some "generic advice".
If your tax return is not
too complicated, as you suggest, you're probably better off using whatever tax accountant you've used in the past, in Australia. Or, just do it yourself, on-line.